Fix(typos) : fixing the spelling errors for the words kubernetes in readme.md and changelog.md

Author: NagurDiwakar

CHANGELOG.md

@@ -434,7 +434,7 @@ consistent with typed JSON metadata decoding, rather than dropping all labels an
     policyName: "servicecidrs.default"
     validationActions: [Deny,Audit]
   --- ([kubernetes/kubernetes#128971](https://github.com/kubernetes/kubernetes/pull/128971), [@aojea](https://github.com/aojea)) [SIG Apps, Architecture, Auth, CLI, Etcd, Network, Release and Testing]
-- Kubenetes starts validating NodeSelectorRequirement's values when creating pods. ([kubernetes/kubernetes#128212](https://github.com/kubernetes/kubernetes/pull/128212), [@AxeZhan](https://github.com/AxeZhan)) [SIG Apps and Scheduling]
+- Kubernetes starts validating NodeSelectorRequirement's values when creating pods. ([kubernetes/kubernetes#128212](https://github.com/kubernetes/kubernetes/pull/128212), [@AxeZhan](https://github.com/AxeZhan)) [SIG Apps and Scheduling]
 - Kubernetes components that accept x509 client certificate authentication now read the user UID from a certificate subject name RDN with object id 1.3.6.1.4.1.57683.2. An RDN with this object id must contain a string value, and appear no more than once in the certificate subject. Reading the user UID from this RDN can be disabled by setting the beta feature gate `AllowParsingUserUIDFromCertAuth` to false (until the feature gate graduates to GA). ([kubernetes/kubernetes#127897](https://github.com/kubernetes/kubernetes/pull/127897), [@modulitos](https://github.com/modulitos)) [SIG API Machinery, Auth and Testing]
 - Removed general available feature-gate `PDBUnhealthyPodEvictionPolicy`. ([kubernetes/kubernetes#129500](https://github.com/kubernetes/kubernetes/pull/129500), [@carlory](https://github.com/carlory)) [SIG API Machinery, Apps and Auth]
 - `kubectl apply` now coerces `null` values for labels and annotations in manifests to empty string values, consistent with typed JSON metadata decoding, rather than dropping all labels and annotations ([kubernetes/kubernetes#129257](https://github.com/kubernetes/kubernetes/pull/129257), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

README.md

@@ -195,7 +195,7 @@ Note: There would be no maintenance for alpha/beta releases except the latest on
 
 The client releases v12 and before following a versioning schema where the major version was 4 integer positions behind the Kubernetes minor on which the client is based on. For example, v12.0.0 is based on Kubernetes v1.16, v11.0.0 is based on Kubernetes v1.15 and so on.
 
-This created a lot of confusion tracking two different version numbers for each client release. It was decided to homogenize the version scheme starting from the Kubernetes Python client based on Kubernetes v1.17. The versioning scheme of the client from this release would be vY.Z.P where Y and Z are the Kubernetes minor and patch release numbers from Kubernets v1.Y.Z and P is the client specific patch release numbers to accommodate changes and fixes done specifically to the client. For more details, refer [this issue](https://github.com/kubernetes-client/python/issues/1244).
+This created a lot of confusion tracking two different version numbers for each client release. It was decided to homogenize the version scheme starting from the Kubernetes Python client based on Kubernetes v1.17. The versioning scheme of the client from this release would be vY.Z.P where Y and Z are the Kubernetes minor and patch release numbers from Kubernetes v1.Y.Z and P is the client specific patch release numbers to accommodate changes and fixes done specifically to the client. For more details, refer [this issue](https://github.com/kubernetes-client/python/issues/1244).
 
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